Ezubere ngwa a maka nchọpụta ọnụọgụ nke in vitro na hormone na-akpali akpali thyroid (TSH) dị na
serum/plasma/nlekọta ọbara dum ma jiri ya nyochaa ọrụ pituitary-thyroid. Naanị ngwa a
na-enye nsonaazụ ule nke thyroid-stimulating hormone (TSH), na nsonaazụ enwetara ga-enyocha ya
ngwakọta na ozi ụlọ ọgwụ ndị ọzọ.